Seguerra's vocal range spans three octaves, from C3 to C6. She has a strong lower register and a clear, soaring upper register. She is also able to produce a variety of vocal effects, such as vibrato, falsetto, and melisma.
Seguerra's vocal technique is very precise. She has excellent control over her voice, and she is able to produce a consistent sound throughout her entire range. She also has a very good sense of pitch, and she is able to sing in tune with other instruments.
Seguerra is a very talented singer with a beautiful voice. She is able to convey a wide range of emotions through her singing, and she has the ability to connect with her audience on a deep level. She is one of the most successful and respected singers in the Philippines, and she has achieved international success as well.